Waluigi Pinball is one of the few DS tracks I actually enjoy. Most courses in that I find boring.

“A thing may be too sad to be believed or too wicked to be believed or too good to be believed; but it cannot be too absurd to be believed in this planet of frogs and elephants, of crocodiles and cuttle-fish.”
― G.K. Chesterton

Seriously wtf!? Banshee Boardwalk for Mario Kart 64 is IMPOSSIBLE!!!!!! This course alone for this game makes me really wonder why MK64 isn't brought up in discussions of "the hardest game of all-time" I have had to retry this stage over 20 times in a row recently on 150cc for special cup due to not coming in 4th or better. This game is definitely going in my top 10 hardest games now for sure.!

Wii U username: KitKat_H12 (Unfortunately HawkeyeWii was already taken some how)
I STREAM LIVE GAMEPLAY AND SPEEDRUNS OF GAMES ON MY twitch channel here: http://www.twitch.tv/hawkeyewii

I always found Sherbert Land and Banshee Boardwalk from MK64 to be quite gruelling...I don't necessarily have a favorite or least favorite track, though 64 and DD seem to have more memorable tracks. (That definitely has to do with the fact that those are the two I "grew up" with, of course)